blob: 37cff5f54704aaf205f66689582acb744ca55110 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $Id: misc.c,v 1.18 2000/08/26 02:38:03 anton Exp $
2 * misc.c: Miscellaneous prom functions that don't belong
3 * anywhere else.
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 */
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/types.h>
9#include <linux/kernel.h>
10#include <linux/sched.h>
11#include <asm/openprom.h>
12#include <asm/oplib.h>
13#include <asm/auxio.h>
14#include <asm/system.h>
15
16extern void restore_current(void);
17
18DEFINE_SPINLOCK(prom_lock);
19
20/* Reset and reboot the machine with the command 'bcommand'. */
21void
22prom_reboot(char *bcommand)
23{
24 unsigned long flags;
25 spin_lock_irqsave(&prom_lock, flags);
26 (*(romvec->pv_reboot))(bcommand);
27 /* Never get here. */
28 restore_current();
29 spin_unlock_irqrestore(&prom_lock, flags);
30}
31
32/* Forth evaluate the expression contained in 'fstring'. */
33void
34prom_feval(char *fstring)
35{
36 unsigned long flags;
37 if(!fstring || fstring[0] == 0)
38 return;
39 spin_lock_irqsave(&prom_lock, flags);
40 if(prom_vers == PROM_V0)
41 (*(romvec->pv_fortheval.v0_eval))(strlen(fstring), fstring);
42 else
43 (*(romvec->pv_fortheval.v2_eval))(fstring);
44 restore_current();
45 spin_unlock_irqrestore(&prom_lock, flags);
46}
47
48/* We want to do this more nicely some day. */
49extern void (*prom_palette)(int);
50
51/* Drop into the prom, with the chance to continue with the 'go'
52 * prom command.
53 */
54void
55prom_cmdline(void)
56{
57 extern void install_obp_ticker(void);
58 extern void install_linux_ticker(void);
59 unsigned long flags;
60
David S. Millerc73fcc82007-07-20 16:59:26 -070061 if (prom_palette)
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 prom_palette (1);
63 spin_lock_irqsave(&prom_lock, flags);
64 install_obp_ticker();
65 (*(romvec->pv_abort))();
66 restore_current();
67 install_linux_ticker();
68 spin_unlock_irqrestore(&prom_lock, flags);
69#ifdef CONFIG_SUN_AUXIO
70 set_auxio(AUXIO_LED, 0);
71#endif
David S. Millerc73fcc82007-07-20 16:59:26 -070072 if (prom_palette)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 prom_palette (0);
74}
75
76/* Drop into the prom, but completely terminate the program.
77 * No chance of continuing.
78 */
79void
80prom_halt(void)
81{
82 unsigned long flags;
83again:
84 spin_lock_irqsave(&prom_lock, flags);
85 (*(romvec->pv_halt))();
86 /* Never get here. */
87 restore_current();
88 spin_unlock_irqrestore(&prom_lock, flags);
89 goto again; /* PROM is out to get me -DaveM */
90}
91
92typedef void (*sfunc_t)(void);
93
94/* Set prom sync handler to call function 'funcp'. */
95void
96prom_setsync(sfunc_t funcp)
97{
98 if(!funcp) return;
99 *romvec->pv_synchook = funcp;
100}
101
102/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
103 * format type. 'num_bytes' is the number of bytes that your idbuf
104 * has space for. Returns 0xff on error.
105 */
106unsigned char
107prom_get_idprom(char *idbuf, int num_bytes)
108{
109 int len;
110
111 len = prom_getproplen(prom_root_node, "idprom");
112 if((len>num_bytes) || (len==-1)) return 0xff;
113 if(!prom_getproperty(prom_root_node, "idprom", idbuf, num_bytes))
114 return idbuf[0];
115
116 return 0xff;
117}
118
119/* Get the major prom version number. */
120int
121prom_version(void)
122{
123 return romvec->pv_romvers;
124}
125
126/* Get the prom plugin-revision. */
127int
128prom_getrev(void)
129{
130 return prom_rev;
131}
132
133/* Get the prom firmware print revision. */
134int
135prom_getprev(void)
136{
137 return prom_prev;
138}